Improved fatigue resistance of gradient nanograined Cu
Cyclic stresses generally lead to fatigue damage and failure with important implications for material and component design, safety, performance and lifetime costs in major structural applications. Here we present unique results for copper to demonstrate that a thin superficial layer of graded surfac...
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sg-ntu-dr.10356-1503252021-06-04T07:17:47Z Improved fatigue resistance of gradient nanograined Cu Long, Jianzhou Pan, Qingsong Tao, Nairong Dao, Ming Suresh, Subra Lu, Lei School of Materials Science and Engineering Engineering::Materials Graded Nanostructures Surface Engineering Cyclic stresses generally lead to fatigue damage and failure with important implications for material and component design, safety, performance and lifetime costs in major structural applications. Here we present unique results for copper to demonstrate that a thin superficial layer of graded surface nanostructure over a coarse-grained core suppresses strain localization and surface roughening, thereby imparting unprecedented resistance to both low-cycle and high-cycle fatigue without compromising ductility. Progressive homogenization of the surface-graded copper is shown to be superior in fatigue properties compared to that of any of its homogeneous counterparts with micro-, submicro- or nano-grained structures. Since the findings here for enhancing resistance to fatigue are broadly applicable to a wide spectrum of engineering metals and alloys, the present results offer unique pathways to mitigate fatigue damage using a broad variety of processing routes, geometric design considerations, and structural parameters in many practical applications. Nanyang Technological University L.L acknowledges the financial support by the National Science Foundation of China (Grants Nos. 51420105001, 51471172 and U1608257) and the Key Research Program of Frontier Science, CAS. S.S. acknowledges support from the Distinguished University Professorship at Nanyang Technological University, Singapore. 2021-06-04T07:17:47Z 2021-06-04T07:17:47Z 2019 Journal Article Long, J., Pan, Q., Tao, N., Dao, M., Suresh, S. & Lu, L. (2019). Improved fatigue resistance of gradient nanograined Cu. Acta Materialia, 166, 56-66. https://dx.doi.org/10.1016/j.actamat.2018.12.018 1359-6454 0000-0001-5372-385X https://hdl.handle.net/10356/150325 10.1016/j.actamat.2018.12.018 2-s2.0-85058690112 166 56 66 en Acta Materialia © 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
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Engineering::Materials Graded Nanostructures Surface Engineering Long, Jianzhou Pan, Qingsong Tao, Nairong Dao, Ming Suresh, Subra Lu, Lei Improved fatigue resistance of gradient nanograined Cu |
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Cyclic stresses generally lead to fatigue damage and failure with important implications for material and component design, safety, performance and lifetime costs in major structural applications. Here we present unique results for copper to demonstrate that a thin superficial layer of graded surface nanostructure over a coarse-grained core suppresses strain localization and surface roughening, thereby imparting unprecedented resistance to both low-cycle and high-cycle fatigue without compromising ductility. Progressive homogenization of the surface-graded copper is shown to be superior in fatigue properties compared to that of any of its homogeneous counterparts with micro-, submicro- or nano-grained structures. Since the findings here for enhancing resistance to fatigue are broadly applicable to a wide spectrum of engineering metals and alloys, the present results offer unique pathways to mitigate fatigue damage using a broad variety of processing routes, geometric design considerations, and structural parameters in many practical applications. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Long, Jianzhou Pan, Qingsong Tao, Nairong Dao, Ming Suresh, Subra Lu, Lei |
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Article |
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Long, Jianzhou Pan, Qingsong Tao, Nairong Dao, Ming Suresh, Subra Lu, Lei |
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Long, Jianzhou |
title |
Improved fatigue resistance of gradient nanograined Cu |
title_short |
Improved fatigue resistance of gradient nanograined Cu |
title_full |
Improved fatigue resistance of gradient nanograined Cu |
title_fullStr |
Improved fatigue resistance of gradient nanograined Cu |
title_full_unstemmed |
Improved fatigue resistance of gradient nanograined Cu |
title_sort |
improved fatigue resistance of gradient nanograined cu |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/150325 |
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1702431265994571776 |